Smoke-burning furnace



. F; woons'om Magazine Stove.

Patentedl Feb, 2. 1869-,

N. PET-ENS, PNOTO-UTNDGRAFNER. WAS

,,/;UNITED STATES PATENT OFFICE.-

FREDERICK A. woonsoN, or ANNA, iLnrNors.

SMOKE-BURNING FURNACE.

Specification forming part of Letters Patent No. 86,620, dated February2, 1869.

To all whom it may concern:

Be it known that I, FREDERICK A. W001)- SON, of Anna, in the county ofUnion and State of Illinois, have made a certain new and usefulSmokeBurnin g Furnace andI do hereby declare the following to be a clearand exact description of the nature thereof, sufficient to enable othersskilled in the art to which my invention appertains to fully understandand use the same, reference being had to the accompanying drawings,making part of this specification, in which the figure is a centralvertical longitudinal section of the furnace, illustrating my invention.

My invention is designed as a process for separating the volatile fromthe ponderable constituents of wood or coal, and reuniting them inconjunction with a fresh supply of air at the point of greatest heat,and there exi aiilstin g all the combustible elements of the In thedrawings, A is the fire-chamber; B, the fuel-chamber; C, thesmoke-chamber; D, the chimney; E, opening for feeding fuel; F, openingfor smoke and gas to pass down G, opening for fresh supply of air; H,the grate; I, the ash-box.

The furnace is divided into three principal chambers: first, chamber A,used as a firebox, and also for radiation an d escape of heat second,chamber B, the middle of which is used as a fuel-magazine, the upperpart a reservoir for smoke and gas, and the lower part for the doublepurpose of mixing the atoms of oxygen with the atoms of hydrocarbon, andalso for heating the mixture before combustion; third, chamber 0 is asmoke-passage communicitgting with both the upper and lower part of Thevent-hole G is the whole width of the furnace, and is so locatedrelatively to the chambers A B O that the current of air cuts under themin its direct draft to the place of greatest heat at the base of A. Theash-box is I. The movable cover is E. The slanting grate H is placed farenough from the partition between A and B to admit the descending fuel.

The operation is as follows: A fire is made in base of A. Afterward B isfilled with fuel. All the smoke and gases evolved from the body of thefuel in B (except that directly under the fire-chamber H) rise byrarefaction to the top of B, and the ponderable parts descend by gravityto the bottom of A. The current of air entering Gr creates a the lowerpart of O, and draws the smoke and gases from the top of B to the vacantspace at the bottom of B, when the oxygen and hydrocarbon are mixed, andalso heated, to some extent, in their passage to the base of A, when aunion is made with the ponderable parts of the fuel and combustion takesplace, thence an exit through chimney.

I do not claim the process of burning smoke, nor of producing asmokeless stove; but

I do claim- A furnace by which the volatile matters are separated fromthe ponderable constituents of fuel, and reunited with a fresh supply ofair at the point of greatest heat, substantially as and for the purposedescribed.

The above signed by me this 31st day of December, 1868.

FREDERICK A. YVOODSON.

W'itnesses:

JOHN A. WIEDERSHEIM, JACOB F. HENRY.

